[unruhjonny]

Ok so I have been doing some digging for NOS GM lifters, and cross referencing application against part numbers.

If I am correct, Sealed power HL-951/HT951 & Elgin HL1951 sell as a BOP lifter, so that might assume that in a pinch, any Buick-Oldsmobile-Pontiac lifter can interchange.
It looks like the aftermarket BOP lifters all use some form of '951' in their part number as a means of identifying them.
(please correct me if I'm wrong)

I was wondering if anyone has written down a list of OEM part numbers with the application which interchange with either of these aftermarket numbers, and made notes for the differences.

This is what I have found from many searches:

5232265 HL-46 Pontiac; all exc 301
5232780 HL-?? Pontiac; 1970 455
5232900 HL-?? Pontiac; 455HO / 70-72 455 s/t
5231360 HL-?? Pontiac; 1964 & earlier "low ball" lifter
5232675 HL-64 Pontiac; RAIV
5232075 HL-?? Pontiac; 60-63SD / RAV; solid/mechanical
5232750 HL-62 Oldsmobile
5232895 HL-?? Oldsmobile; 0.010" oversized application for '750
5232245 HL-47 Buick (Also 61-62 Pontiac?!)
5232765 HL-57 Buick 455
5233005 HL-?? Buick; 0.010" oversized application for '765

I have intentionally left the Chevrolet lifters off because I understand the oiling band is not in a good spot... again, please correct me here.

Can anyone fill in any of these blanks, or correct me if they will NOT work in a Pontiac V8?

[Schurkey]

BOP? Probably not. The Olds/Pontiac lifter is likely the same although there may be model-year differences on both that I'm not aware of. Chevy, and 70-up Buick big block are essentially the same except the pushrod cup height is different. Pushrod cup height is easily compensated for by changing pushrod length. I don't know about small-block or V6 Buick--I suspect they're the same as the '70-later BBB.




Lunati sold an Olds/Pontiac lifter with "951" as part of the part number. This went into my Olds Toro 455:


Note that '67--'69 Buick lifters did not provide oil to the pushrods. The rockers were lubed through the rocker shaft. And that may or may not be true of the small-blocks, and the V6. The '53--66 "Nailhead" Buick lifters were different than any of the others.

[unruhjonny]

thank you for a great reply.

I did stumble here on a thread where an HL-46 & HL-47 lifters were disassembled, and (at least in that discussion) nothing could be seen as different;
From your description, maybe they were HL-46 lifters mislabeled as HL-47 ??

[Jason67]

5231360 - HL25
17085567- HL25A